1) This hadith establishes that locusts are halal. You eat them by frying (boiling, grilling, cooking etc.) them.

2) Shaikh Abdullah Bassam mentions there is ijma of the Muslims on the lawfulness of eating locusts. [Tawḍih al-Aḥkam [7:10]

3) It was narrated from ‘Abdullah bin ‘Umar that the Messenger of Allah (Sallalahu Alayhi Wa Sallam) said:

“Two kinds of dead meat and two kinds of blood have been permitted to us. The two kinds of dead meat are fish and locusts, and the two kinds of blood are the liver and spleen” (Sunan Ibn Majah, Book of Food, [no.3218, Ahmad [2:97 no.5690]

4) This is one of the best diets (rations) to have whilst being in battle because:

Readily available and you don’t need to look after them like other animals such as cows, chicken etc.